Special protecting material for oversized round billet made of medium carbon steel for continuous casting mold
A technology of continuous casting mold and protective material, applied in the field of metallurgical auxiliary materials, can solve the problems of looseness, difficult control, pull-off at the connection between the billet and shell or steel breakout.
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Embodiment 1
[0023] A special continuous casting mold protection material for carbon steel in super large round billets, including premelt material (premelt material composition includes: SiO 2 28.0~33.0%, CaO 21.0~25.0%, Al 2 o 3 6.0~9.0%, R 2 O 3.0~7.0%, F - 2.5~6.0%), albite powder, cement clinker, sodium carbonate, fluorite, red iron oxide, lithium carbonate, carbon black, 85 flake graphite; the mass percentages are 40.0%, 16%, 3%, 12.0%, 5.5%, 1%, 2.5%, 14%, 6%.
[0024] The active ingredient of the protective material is SiO 2 , CaO, Al 2 o 3 、Na 2 O, F - , MgO, Fe 2 o 3 , whose mass percentage is SiO 2 30%, CaO 24%, Al 2 o 3 3%, Na 2 O 10%, F - 2%, MgO 4%, Fe 2 o 3 1%.
Embodiment 2
[0026] A special continuous casting mold protection material for carbon steel in super large round billets, including premelt material (premelt material composition includes: SiO 2 28.0~33.0%, CaO 21.0~25.0%, Al 2 o 3 6.0~9.0%, R 2 O 3.0~7.0%, F - 2.5~6.0%), albite powder, cement clinker, sodium carbonate, fluorite, red iron oxide, lithium carbonate, carbon black, 85 flake graphite; the mass percentages are 40.0%, 16%, 3%, 12.0%, 5.5%, 1%, 2.5%, 14%, 6%.
[0027] The active ingredient of the protective material is SiO 2 , CaO, Al 2 o 3 、Na 2 O, F - , MgO, Fe 2 o 3 , whose mass percentage is SiO 2 35%, CaO 18%, Al 2 o 3 5%, Na 2 O 6%, F - 4%, MgO 2%, Fe 2 o 3 2%.
Embodiment 3
[0029] A special continuous casting mold protection material for carbon steel in super large round billets, including premelt material (premelt material composition includes: SiO 2 28.0~33.0%, CaO 21.0~25.0%, Al 2 o 3 6.0~9.0%, R 2 O 3.0~7.0%, F - 2.5~6.0%), albite powder, cement clinker, sodium carbonate, fluorite, red iron oxide, lithium carbonate, carbon black, 85 flake graphite; the mass percentages are 40.0%, 16%, 3%, 12.0%, 5.5%, 1%, 2.5%, 14%, 6%.
[0030] The active ingredient of the protective material is SiO 2 , CaO, Al 2 o 3 、Na 2 O, F - , MgO, Fe 2 o 3 , whose mass percentage is SiO 2 32%, CaO 20%, Al 2 o 3 4%, Na 2 O 8%, F - 3%, MgO 3%, Fe 2 o 3 1.5%.
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